Magazine for a firearm



FIG. 1 is a front perspective view from above and one side of a magazine for a firearm showing my new design;

FIG. 2 is a side elevational view thereof from the side opposite that visible in FIG. 1;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a view thereof similar to FIG. 1 but from the side opposite that shown in FIG. 1; and

FIG. 7 is a view thereof similar to FIG. 3 but from the side opposite that shown in FIG. 3. 

The ornamental design for a magazine for a firearm, as shown. 